Which hash algorithm does it use?

A standard cryptographic hash algorithm reliable enough that two different files essentially never produce the same hash by coincidence.

Does it upload my files anywhere to compute the hash?

No, hashing happens locally in your browser — files aren't uploaded anywhere.

What does it mean if the hashes don't match?

The files differ in content somewhere, even if by just one byte — file size or name being the same doesn't guarantee identical content.

Does Compare File Hashes upload my files to a server?

No. Compare File Hashes runs entirely in your browser using on-device processing, your files never leave your device.

Compare File Hashes

Check whether two files are identical by comparing their hashes.

Runs in your browser

First file

Drop a file

Choose File

Second file

Drop a file

Choose File

Algorithm

Hashed entirely in your browser, files are never uploaded to a server.

About this tool

Confirming two files are genuinely identical — not just similarly named or similarly sized — means comparing their content hashes, since even a single differing byte produces a completely different hash. This tool checks whether two files are identical by comparing their hashes, giving you a definitive answer instead of an unreliable guess based on file size or name.

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